using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using HDL_ON.Entity;

namespace HDL_ON
{
    public class Packet
    {
        /// <summary>
        /// 缓冲区大小
        /// </summary>
        public const int Size = 1024 + 200;

        /// <summary>
        /// 接收到的数据
        /// </summary>
        public byte [] Bytes;

        /// <summary>
        /// 远程的套接字
        /// </summary>
        public System.Net.EndPoint RemoteEndPoint;

        public Packet ()
        {
            this.Bytes = new byte [Size];
            RemoteEndPoint = (System.Net.EndPoint)new System.Net.IPEndPoint (System.Net.IPAddress.Any, 0);
        }
        public Packet (byte [] data, System.Net.EndPoint remoteEndPoint)
        {
            this.Bytes = data;
            this.RemoteEndPoint = remoteEndPoint;
        }

        /// <summary>
        /// 记录已经发送数据出去的时间
        /// </summary>
        public System.DateTime FlagDateTime;

        /// <summary>
        /// 已经发送了多少数
        /// </summary>
        public int HaveSendCount;

        public delegate void DelegateReceive (byte subnetID, byte deviceID, Command command, byte [] usefullBytes, string revGatewayIP);
        public static event DelegateReceive ReceiveEvent;
        /// <summary>
        /// 接收到的所有数据
        /// </summary>
        public static Action<byte, byte, int, Command, byte, byte, byte [], System.Net.IPEndPoint> ReceviceAllDadaAction;
        /// <summary>
        /// 处理接收到的数据
        /// </summary>
        public virtual void Manager ()
        {
            //对于操作数据库的时间比较长的，可以创建另一个线程处理
            if (!"HDLMIRACLE".Equals (System.Text.Encoding.ASCII.GetString (Bytes, 4, 10))) {
                return;
            }

            byte subnetID = this.Bytes [17]; //源子网号
            byte deviceID = this.Bytes [18]; //源设备号

            //源设备类型
            int deviceType = this.Bytes [19] * 256 + this.Bytes [20];

            Command command = (Command)(Bytes [21] * 256 + Bytes [22]); //操作码控制命令

            byte targetSubnetID = this.Bytes [23];
            byte targetDeviceID = this.Bytes [24];

            //不是要接收的指令就返回
            if (!((targetSubnetID == 252 && targetDeviceID == 252) || (targetSubnetID == 0xff && targetDeviceID == 0xff))) {
                return;
            }
            byte [] usefulBytes = null;
            if (this.Bytes [16] == 0xFF) {
                usefulBytes = new byte [Bytes.Length - 16 - 11];
                System.Array.Copy (Bytes, 27, usefulBytes, 0, usefulBytes.Length);
            } else {
                //有用的附加数据
                usefulBytes = new byte [this.Bytes [16] - 11];
                Array.Copy (Bytes, 25, usefulBytes, 0, usefulBytes.Length);
            }

            if (ReceiveEvent != null) {
                ReceiveEvent (subnetID, deviceID, command, usefulBytes, $"{Bytes [0]}.{Bytes [1]}.{Bytes [2]}.{Bytes [3]}");
            }

            //if (command == Command.SuperGatewayAgentACK) {
            //    SuperGateWay.SendAndReceiveDatas.Recevice (subnetID, deviceID, usefulBytes);
            //}
            if (ReceviceAllDadaAction != null) {
                ReceviceAllDadaAction (subnetID, deviceID, deviceType, command, targetSubnetID, targetDeviceID, usefulBytes, (System.Net.IPEndPoint)RemoteEndPoint);
            }
            //处理是否要重发数据
            Control.ManagerReceive (subnetID, deviceID, command, targetSubnetID, targetDeviceID, usefulBytes, RemoteEndPoint);

        }
    }
}